Sifter



Sept. 22, 1925. 1,554,234 R. D. scHNooR SIFTER Filed July 31 1924 2Sheets-Sheet l 5x5/mand IQ Sa/222002 Sept. 22, 1925. 1,554,234

R. D. SCHNOOR SIFTER Filed July 51 1924 '2Sheets-Sheet 2 Izl/zo/v@Raymann' l?. Ml/war y- Mft/ZM, 0%?

.. To. @Elfde/minuit may Come/Mw f. disassembly.

; Fig.; 1...

Patented Sept. 22, 1925.

RAYMoNn'nr soHNo'on;

or oHIeAGoILJINoIsi Y f SIFTERJ.

Applicatifnni' fried '.'JilyfA 3 1;

Bef itxlnownr ith-zit :lg Rn YMonnD-i/Sounoon, a Avcitizen-1of the..United' l States` residing at- Chica-go,4 in: the eonn-tyyof Cools andStat ,adir Illinois., L have: invented;V a; certaine newl and usefulImprovementin: Siftenslof whieli, xtlieU followingsgis ai ffullsy elem',eoneise,. and. esae't description',y reference, bei-nggfhad: fte -ilieaecomnanying drawings, for1n'in g,;, a; bai-tf of`this;specificati.on.fA VV o v My.- invention has;y particular;` relationtodomesticf Home sifters althouglignot limited to this nsealone'., y

The y. meinfeatnies :of fthe. inw'eniion reside'. in; the-f provision iof: af simple, convenient,` y compeet, y andi efficient. sifter adaptedfor econ omical fmanu-faeture aifn-rdingf.; a stui'dfi-Ieonstmnetionfwell adapted-fop its purpose, suseepjtiblef of `mannfaoturelof i sheet snietal,4 and; adapted1 forV convenient assembly and..

lV'ith'- these vfeatures... in.; Viewn my.'l invention' eonsistseincertain featnieseof i novelty... in fthe f construction@ ooinbination-,f` and ,f a;- rangement ofparts by wliieh -jthe .saidfeaftunes and er-tain other features,4 ,hereinafter appearing, aieeifeetedgallas fnlly d `Vscribed; with' reference to ltlie-aeeonnnanyindd-rawing-s and: ,morespartionlarly` pointed ontin.v the. ,el aims. Y -yIn the said Adrawings-*- Fignnenl. is a. side eleifationuof. asiftei1`embodyingmy invenfcion-4 witlliLpai-ts brokenaway.,

Fignrelis ay section-.ion the. line-2&2 ofi Figines 3 and A- are sideelevations ,off the twomain(assemblies ofthesifter with .partsbrokenaway.. Y Y

Lik charac-ters of refereneeindiealfe like.

partsln l.the several views.`

toQtlie'drawings 1 designates as sheet metal cylinder. at rone A.endendvforn'ied integrally with .themain portion of whieh-.isv a cylindiioal.4 han hold formation. .2. sepa.-V rated from: ilieinain.portionbf theffraine by aninwardlyy projecting annular beadf. A. secondsheet. metal cylinder 41 has r4the main portion vthereof nested lwithinthe'l cylinder l1 and "has formedv integrally, with the ma-in Aportionthereofzan enlarged eylindrif cal.. lia-iid.. hold vformation .y 5 atone. end' thereof. whichformation` is provided with anannnlar outwardlyrproj eeting; V.bead f6 `adj acent ,its Vinner. end.y Theserroylindersare so arrangedfthat the .cylinder .4L will nest. with?.

nular. inwardlyy projecting., bead y12 at the.

1924;- seriainaf '129;31-0;

inthe Cylinders llwitli thleliand lioldwforf ymations 2 and 51atopposite ends. of the las.- semblage` andfwlieii=-tlieiiig= cylindersare so nested the ends-thereof opposite those at!l wliiehpvthe Yafomementioned hand; hold :found tio-ns,- areA disposed i are adapted 1to! respec-` tively engage` against. tli'e'zinside. .snrfaee Aof i' thebeady Sfand the inside-surface of lthe bea d 6 with.-the. innersin-facey of the cylinder:` 1y

V engaging.- the Vnormal sn-rfaee' oftheffh-and.l

hold fonmation.. 5. Seev Fig; 1. 'lhnsaref provided bearings.` between Ythe two eylinders disposed at, opposite endsof the mein.

portionsaofthe.eylinders, and-theibeadengagging-ends o-fithe cylindersare. beadedin a lusual .mannen to provide proper. bearing-` surfaees;and. ,to strengthen. .theseyends :of 1the cylinders.` The bearings. sozformed provide supports-..atgo}: posite ends of the main .ppi-. tions of`the oylinders 4 whereby; the' cylinders are supportedwith'respecttoeaehother fon.

angniar movement.- and; whereby the eylinders` may be: removed. .byrelativelongitnfl dinal movement; ,from reaeh= other. y

A thi-rdfslieet lnetalveylinder. 7 is nested4 within. .the kcylinder 1and .is enlarged jat ihe endztlifereof adjiaeent the hand-liold\rfoi1na.tion 2 of theeylinderlVas designa-ted at 8, and ithis .enlargedfend v 8yffrietionalily. en. gaged-in theinner.portionof this-hand fhold'formationM wherebyAV thecylinders. 1 and.. 'i' l `liandihold.formation5, and"tl ife Cylinder .7

is providedfwith an annulariinwardly projeeti'ngg bead .at .the end -of'the :main poni tion thereof adjaeent'the enlargedend r8 l101i thereof(When. the .cylinders are 'nested 5to p gether the end f .of the. -eylinder 7`. opposite the enlarged4 end .tliereof engegesjthe bead-' 12,a1id.,the l. end .l of the cylinder.. 9 opposite 1 the. enlarged, endfl11 thereofj` engages the. beadi 13.y See.. Fig, l l. Tliiis .areprovided bearingsbetween; thefeylinders 4.. andl 7 at the end of thecylinder 7 opposite the end which is secured to the cylinder 1 andbetween the cylinders 9 and 7 at the end of the cylinder 9 opposite theend which is secured to the cylinder 11, and these bead engaging ends ofthe cylinders 7 and 9 are A beaded in a usual manner to provide properbearing surfaces and to strengthen these ends of the cylinders. Theselast mentioned bearings so formed provide supports at opposite ends ofthe main portions of the cylinders 7 and 9 which in conjunction with theaforementioned bearings between the cylinders 1 and 4 provide supportsat opposite ends of the main portions of the cylinders whereby thecylinders 1 and 7 secured together and the cylinders L1 and 9 securedtogether are supported with respect to each other for angular movementand whereby the pairs of cylinders may be removed, by relativelongitudinal movement, from each other. Thus it will be observed thatthe cylinders are alternately secured together at respective oppositeends of the main portions thereof, and that bearings are provided at thefree ends thereof for supporting the cylinders with respect to adjacentcylinders for relative angular movement, the pairs of secured cylindersbeing removable from each other by longitudinal movement.

A circumferentially anged circular sheet metal closure member 14 isfrictionally engaged in the outer portion of the hand hold formation 2and closes this end of the receptacle of the sifter, this closure beingprovided with an exterior handle 15 whereby it may be easily removedfrom and installed in the hand hold formation 2. The other end of thereceptacle of the sifter is closed by a circular disk member 16 disposedwithin the hand hold formation 5 and held against the transverse wallbetween the main portion of the cylinder 9 and the enlarged end 11thereof by a circumferentially flanged closure member 17 frictionallyengaged in the outer portion of the hand hold formation 5.

The main portions of the cylinders 1, 4, and 7 are constructed asfollows to constitute cylindrical screens. The main portion of each ofthese cylinders is provided with a plurality of longitudinally extendingopenings 1S spaced around the same, these openings being preferablyformed by striking out the metal 19 of the cylinders at said openingswith the metal 19 attached to the longitudinal sides of the openings andbending the metal 19 inwardly over the adjacent portions of thecylinders whereby to form thickened portions. See particularly Fig. 2.Metal screeningr 21 extends around respectivecylinders on the insidesthereof and over said openings and is secured to respective cylinders,such as by soldering, whereby to complete the cylindrical screens. The

thickened portions of the cylinders formed by the metal 19 being bentover the adjacent portions of the cylinders form eifective agitatorformations on the inner and intermediate cylindrical screens foragitating material between the screens with relative angular movement ofthe screens, and in addition serve to strengthen the cylinders along theopenings 18. It will be observed that by the construction just describedthe longitudinal edges of the agitator formations are rounded withoutnecessitating additional manufacturing operations, and that the outerlongitudinal edges of the metal 19 are covered by the screening.

The main portion of the inner cylinder 9 is constructed as follows toconstitute a cylindrical agitator. The main portion of this cylinder isprovided with a plurality of longitudinally extending openings 22 spacedaround the same, these openings being preferably formed by striking outthe metal 23 of the cylinder at said openings with the metal 23 attachedto the longitudinal sides of the openings and bending the metal 23outwardly so that the outer longitudinal edges thereof lie adjacent theinner screen for agitating material within the receptacle of the sifterand with respect to the inner screen.

In operation the material to be sifted is placed in the receptacle byremoving the closure member 1st and placing the material within thereceptacle of the sifter. After replacing the closure member 14 thesifter is held by grasping the hand hold formations 2 and 5 withrespective hands of the user, and these hand hold formations are givenrelative angular movement. This angular movement of the hand holdformations eifec-ts angular movement between the screens and between theagitator and the inner screen. rIhe material thus agitated in thereceptacle of the sifter is sifted through the inner screen. Between theinner and intermediate screens the material is agitated .by the agitatorformations of the inner screen and is sifted through the intermediatescreen. Between the intermediate screen and the outer screen thematerial is agitated by the agitator formations of the intermediatescreen and is sifted through the outer screen of the sifter. Thebearings at the ends of the screens prevent material from passing by thescreens at the ends thereof.

The screening 21 of the several screens, as shown, varies in mesh from arelatively coarse mesh on the inner screen cylinder to a relatively finemesh on the outer screen cylinder to effect sifting of material inprogressive stages. However, this arrangement is not necessary and forsome purposes it is more advantageous that the graduated arrangement beeither reversed or that the screening of all the screens be of the same25H sembly.

kunnen;

sizenmeslr as Where incthesiifting Ofiitomhitis .desired fto.iiflnfifttlreaflonr in the. sifting thereotf- Iti will jbev observed;that thle.constructio1i 5-co-1npriscs1two assemblies; i.. er, the.agitaton` cylinder f91 and fthe .intermediate screen Icylim der, 4isecured :with the .lrand `iliiold formations.vk 5,. see.1li`.ig. f4,Aand tlre inner and-outer screen cylinders .l' and .Tisecured nvitliritbefh and fhold 10* forniationQ-l,`y seeellig.. 3. These: twofassemf.

blieseareiI separable and eengageable. by,v relae.

tivenlongitudinal movementi for cleaning by reason of the construction,vparticnlarlj7 the.l constrnction .of fthe. aforementioned 4bearings a15. which' are :adapted to. permitsnch-movelnent It: will Aalso.ibewobserved'that, by: reason ofi theafrictional :connections.between the. cylilib. dens 1 and t7and: ill f and 9x iand'ztlie;frictional engagement Y of :the` lclosure::members r 14 i and 20f 17respectively with the handilroldforma.

tions and l5:1theecylinders .1l and 7''and1, l andl; may bei. easily.separated fromm each other ands reassembled. d Tlrisnconstruction alsofaffords..v convenient mannfactu-ringv as.

thi lev ,I have;- lierein shown .and particleA i larly described the.;'reterredv embodiment of myviinvention lido not-:Wisheto loe lin'litedite, thecpreoise details :of 'construction shown as 1.

ichanges may :readily beA madel withontr departingztrom, the spirit :oflmyk invention, but havingthns Qdescribedomy invention .I claim as ,new-anpd "desire -tof .secure bvhettersalntentitlife.,following:v ,1 1iThecombinationin a sitter-.olla plurality of fnested icyliindricalscreens each?. of which iis :anovable ninth respectl to Vthe adj as centsci-cena or* screens, anfagitatoni Within the. innermost screen-fandimovablecwith :ref`

.1 spect ,thereto-,1 andngitator fonmationsnasso-f.

cia'tednvithi thescreens :for eifectingeagita.- i tionf. ozfl: materialbetween the screensrwitln relative movement ot' :ther screens .as i andlgfortliepnipose described;

2; 'Tliefcombination 4in ai; siftereozf .'aV-.plgurality. of nestedvcylindrical fscreens'ieach voili f. whichy .is movable` with. ,respect:to the adjar. cent screen or screensan fagitatone Within..- theinnermost screen and movableowithi reT a spe,ctitheretoiyagitatoinformations associatedL wlthfthelsereens for effectingagitetioneot:

material between tlie y screens'k withj relativer f mevenieiltnt thescreens Saidfiagitater ande; Screens beleef alternately i secar-ed.`togetherr wherebyzte-eetfect simultaneous movementgfbee tween adjacentscreens andbetwveenigthe agis, fate-r andetlaei-nnermostfscreen. 1

3. Thee-combinati@ 4im .assit-tten Offrai plus i rality of nestedcylindrical screens each of Which-.is angnlarlymovable with'` respect toY the adjacent screen or screens, a cylindrical agitator nested Withinthe Vinnermost screen and angularly movable With -respect thereto, saidagitator and said screens being alternately secured together atrespective opposite, ends` ci.4 theiscreens. whereby to. effectsimultaneous; movement between; adjacent;

Which vEis z angularly movable Witlr .respect to 802- tlie.adjacentrscreen ,vor screens; and iagitator; Y formations.' associated:with! the; screens".foinl effecting agitation of material betvveennthe.iscreens With". relative! .aiirgnlwri movement* of the` screens .as andlfoar tlreipn-rpose described. S521 6c, The combination .im ai. sitteroil a pilarality :of jv nested cylindrical sereensteach i ot i which iis.angularly movable with :respect i to. i the: ,adjacenti screenr orscreens,I agitator. foie mations; associated. with: tbel screens. for90* effecting agitation i of: material between the g screenscivith.relative angular' movementi of i theiscreens, .and hand holdsxatopposite ends of 'fthe screens Wit-lr which the.V screens .are

alternately', secu-reds' for*V effecting angl-itat,-95i

movement between adjacent :screenen 74.2 .Thea combination iin.-awsifter off iay plus` rality `of nestedcylindricalscreens-eachi otwhichv is.angularlyvinovablei withzzrcspectrto i ythe adj acent tscreen;',or 1 scrcens, .a icyli'ndrical agitatorvnested Within :the -inneirmost.-screen and .anginlarly movable with `.respect .thereto,1

agitator f formations. associated with? the screens for;- eiiectingaagitation x ot material between x the." screensflwithl.. relative.-angular f' movement lof :the screens, and; ha nd holds at Opposite ends.of 4the screens l.with .Whicli-the. screens andagitator-are alternatelysecured. for 1 electing. ia n-gnlar movement between theV screens i and.1 between] the innermost. screen`- and the jagitator 8. Thecombinati/ouin a sifterfoaplne rali-tyofmestedf cylindrical screens, .acylindrical .lagitatornested lwithin the:` innermost r screein, saidagitator and screens being alter-` nately secured together at respectiver op 3ov sitel endsof the` .screenswvliereby to e ect Simnltaneousmovementf betweem adjacent.`4 screensiandbetween the agitator.- andthe.in'

nermostscreen, andbearingsat the free ends.120 'i of. 1 the(agitatorrand; iscreens yfor supporting saidagitator, and screensviithrespect to ad.-f jacent screens for.. relativeangulan xmov'ement. and:adapted yto; pv the .l-scrjeens; at the ends thereof.;

9. The combination in a sitter of a plurality of nested cylindricalscreens, a cylindrical agitator nested Within the innermost screen,agitator formations associated with the screens for effecting agitationof matclyevent `material ipassingby.-

rial between the screens wit-h relative angular movement of the screens,said agitator and screens being alternately secured together atrespective opposite ends of the screens whereby to effect simultaneousmovement between adjacent screens and between the agitator and theinnermost screen, and bearings at the free ends of the agitator andscreens for supporting said agitator and screens with respect toadjacent screens for relative angular movement and adapted to preventmaterial passing by the screens at the ends thereof and to permitlongitudinal movement of the agitator and screens with respect toadjacent screens for removing said agitator and the screen or screenssecured therewith from the remaining screen or screens.

10. The combination in a sifter of a cylindrical screen, a cylindricalagitator nested within the screen and angularly movable with respectthereto, bearings at opposite ends of the screen whereby the screen andagitator are supported with respect to one another for relative angularmovement, solid cylindrical formations at respective ends of the screenand forming hand holds and secured respectively with the screen andagitator, and circular closures frictionally engaged in said cylindricalformations.

11. The combination in a sifter of a plurality of nested cylindricalscreens, a cylindrical agitator nested within the inner screen, agitatorformations associated with the screens for effecting agitation ofmaterial between the screens with relative angular movement of thescreens, closures and hand holds at respective opposite ends of thescreens, said agitator and screens being alternately secured withrespective hand holds at respective opposite ends of the screens, andbearings at the free ends of said agitator and screens for supportingsaid agitator and screens with respect to adjacent screens for relativeangular movement and adapted to prevent material passing by the screensat the ends thereof.

12. The. combination in a sifter of three nested cylindrical screens, acylindrical agitator nested in the inner screen, agitator formationsassociated with the screens for effecting agitation of material betweenthe screens with relative angular movement of the screens, cylindricalhand hold formations at respective opposite ends of the screens andformed integrally with respect to the two outermost screens, a thirdcylindrical formation at one end of the inner screen and formedintegrally therewith and frictionally engaged in the cylindricalformation of the outermost screen whereby the inner and outer screensare secured together, a fourth cylindrical formation at one end of theagitator and formed integrally therewith and frictionally engaged in thecylindrical formation of the intermediate screen whereby the agitatorand intermedia-te screen are secured together, bearings at the free endsof the agitator and screens for supporting the 'agitator and screenswith respect to adjacent screens for relative angular movement andadapted to prevent material passing by the screens at the ends thereofand adapted to permit removal of the agitator and intermediate screenfrom` the inner and outer screens, circular closures frictionallyengaged in said cylindrical hand hold formations, and an exterior handleon one of said closures for removing the same to fill the sifter.

13. The combination in a sifter screen of a cylindrical sheet metalframe provided with a plurality of openings therein and formed bystriking out the metal of the frame at said openings with this metalattached to sides of the openings and bending the same on the adjacentportions of the frame whereby to form agitator formations and screeningextending over the openings so formed and secured to the frame.

14. The combination in a sifter screen of a cylindrical sheet metalframe provided with a plurality of openings therein and formed bystriking out the metal of the frame at said openings with this metalattached to the sides of t-he openings and bending the same over theadjacent portions of the frame whereby to form thickened agitatorformations, and screening extending over the openings so formed anddisposed on the side of the frame wall upon which said struck up andbent over metal is disposed and secured to the frame.

15. The combination in a sifter screen of a cylindrical sheet metalframe provided with a plurality of longitudinally extending openingsspaced around the same and formed by striking out the metal of the frameat said openings with this metal attached to the longitudinal sides ofthe openings and bending the same inwardly over the adjacent portions ofthe frame whereby to form thickened agitator formations, and screeningextending around the frame on the inside thereof and over said openingsand secured to the frame.

In witness whereof I hereunto afiix my signature this 26th day of July,199A.

RAYMOND D. SCHNOOR.

